A 24-core optical fiber cable follows the TIA-598-C standard, using the first 12 standard colors for fibers 1–12 and repeating the same colors with a stripe or marker for fibers 13–24.

Standard Fiber Colors

For a 24-core cable, the first 12 fibers are assigned the base TIA-598-C colors:

1. Blue
2. Orange
3. Green
4. Brown
5. Slate (Gray)
6. White
7. Red
8. Black
9. Yellow
10. Violet
11. Rose (Pink)
12. Aqua Fibers 13–24 repeat the same sequence but are distinguished by a black stripe or tracer on the fiber jacket to maintain unique identification within the cable bundle . For example, fiber 13 would be Blue with a black stripe, fiber 14 Orange with a black stripe, and so on up to fiber 24 (Aqua with a black stripe).

Identification in High-Count Cables

In high-count OPGW cables, fibers may be grouped into buffer tubes, with each tube containing 12 fibers. The tube itself may have a color (e.g., Green for the third tube), and the individual fibers inside follow the 12-color sequence with stripe markers for repeated groups . This system ensures that each fiber can be uniquely identified for splicing, termination, and maintenance.

Practical Notes

• Cable Jacket Color: The outer jacket of OPGW cables is typically metallic or gray for outdoor use, but the internal fibers follow the color code described above .
• Connector and Splice Identification: When terminating or splicing, the fiber color code ensures correct matching of fibers across connectors and splice trays.
• Compliance: Following TIA-598-C ensures global consistency and reduces errors during installation and maintenance . By adhering to this color scheme, technicians can efficiently manage 24-core OPGW cables, avoiding miswiring and simplifying troubleshooting.